Unless you are fortunate enough to live on a water abundant world (like Earth, the red planet, and yes, even the Moon), future space travelers are going to have to recycle every drop of water that exits their body (regardless of origin).
Since bacteria have a tendency to thrive in micro gravity, astronauts will need to find a way to kill off these microscopic creatures before they kill us off via recycled sweat and other bodily fluids (especially since our immune system becomes weaker in zero-G).
Fortunately for us a company may have a quick solution that is not only effective but inexpensive as well.
(Homedics, note: PDF file) UVC [ultraviolet C] light, with wavelengths between 100 and 280 nm, is commonly referred to as “germicidal light” due to its effectiveness in destroying microorganisms. UVC light acts as a natural outdoor air purification system by deactivating the DNA of microorganisms and destroying their ability to multiply. [...]
Utilizing the germ-killing benefits of UVC light, HoMedics, the leader in health and wellness products, developed Restore®, a complete water purification system in an easy to use pitcher. Restore combines UV Clean technology to remove bacteria, viruses and microbial cysts with a filtration ...